Question 1

Select the best reagent or sequence of reagents from the list provided which would best accomplish each transformation below. Place the letter corresponding to the reagent(s)  in the blank to the left of each reaction. Each transformation requires only one answer.
-_____ 2SO4, HgSO4 B) H2, Lindlar C) 1.BH3, THF  2.H2O2, NaOH D) 1.NaNH2, NH3(l)  2.CH3CH2I E) 1. Br2,CH2Cl2  2. 2NaNH2, NH3(l)  F) 1.HCl  2.NaNH2, NH3(l)  G) Li, NH3(l)  H) 1.	NaNH2, NH3(l)  	2.	CH3CH2CH2I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  H2SO4, HgSO4
B)  H2, Lindlar
C)  1.BH3, THF  2.H2O2, NaOH
D)  1.NaNH2, NH3(l)  2.CH3CH2I
E)  1. Br2,CH2Cl2  2. 2NaNH2, NH3(l) F) 1.HCl  2.NaNH2, NH3(l) G) Li, NH3(l) H) 1.	NaNH2, NH3(l) 	2.	CH3CH2CH2II) G) and H)
J) C) and G)

Question 2

The product of the reaction when the following substance is treated with BH3 in THF followed by H2O2 would be a ketone.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following reagents react with 2-butyne to form (Z) -2-butene
1) H2/Lindlar catalyst
2) (sia) 2BH followed by CH3COOH
3) Na/NH3

Accepted Answer

A)  only 1
B)  only 2
C)  only 3
D)  only 1 and 2E) A) and B)
F) B) and C)

Question 4

Which sequence of reactions can be used to convert (Z)  2-pentene to 2-pentyne

Accepted Answer

A)  Treatment with Br2; followed by treatment with NaNH2
B)  Treatment with Br2, H2O; followed by treatment with NaOH
C)  Treatment with Br2; followed by treatment with H2SO4
D)  Treatment with HBr; followed by treatment with NaOHE) A) and B)
F) B) and C)

Question 5

What is the major organic product obtained from the following reaction?

Accepted Answer

A)  (
E)   1,2-dibromobutene
B)  (Z)  1,2-dibromobutene
C)  (
E)   2,3-dibromobutene
D)  (Z)  2,3-dibromobuteneE) B) and D)
F) B) and C)

Question 6

Outline how one might achieve the following transformation, showing reagents and the isolated intermediates in the synthetic scheme.

Accepted Answer

The answer of Outline how one might achieve the following...

Question 7

Consider an unknown with the molecular formula C4H6. The index of hydrogen deficiency of this compound is _____.

Accepted Answer

Question 8

What is the major organic product obtained from the following reaction?

Accepted Answer

A)  butane
B)  1-butene
C)  cis-2-butene
D)  trans-2-buteneE) None of the above
F) A) and D)

Question 9

What is the IUPAC name for the following compound?

Accepted Answer

A)  (R) -3-methyl-1-penten-4-yne
B)  (S) -3-methyl-1-penten-4-yne
C)  (R) -4-methyl-4-penten-1-yne
D)  (S) -4-methyl-4-penten-1-yneE) A) and C)
F) A) and D)

Question 10

What is IUPAC name of the following compound?

Accepted Answer

The answer of What is IUPAC name of the following...

Question 11

Outline how one might achieve the following transformation, showing reagents and the isolated intermediates in the synthetic scheme.

Accepted Answer

The answer of Outline how one might achieve the following...

Question 12

What is IUPAC name of the following compound?

Accepted Answer

The answer of What is IUPAC name of the following...

Question 13

What is the major organic product obtained from the following series of reactions?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) C) and D)
F) B) and D)

Question 14

How many terminal alkynes are there with the molecular formula C7H12?

Accepted Answer

A)  5
B)  7
C)  8
D)  9E) B) and D)
F) A) and D)

Question 15

What is the major organic product obtained from the following reaction?

Accepted Answer

A)  2-hexanone
B)  hexanal
C)  2-hexanol
D)  cis-2-hexeneE) C) and D)
F) None of the above

Question 16

What is the major organic product obtained from the following reaction?

Accepted Answer

The answer of What is the major organic product obtained...

Question 17

H2 and Ni would be the required reagents for the following conversion.

Accepted Answer

A) True 
 B)False

Question 18

The following species is referred to as a(an)_________________.

Accepted Answer

acetylide ...

Question 19

Which of the following has the lowest pKa?

Accepted Answer

A)  butane
B)  1-butene
C)  1-butyne
D)  2-butyneE) B) and D)
F) C) and D)

Question 20

What is the IUPAC name of the following compound

Accepted Answer

A)  vinylcyclohexane
B)  allylcyclohexane
C)  ethynylcyclohexane
D)  acetylcyclohexaneE) A) and C)
F) A) and D)

Exam 7: Alkynes

The following species is referred to as a(an)_________________.

Correct Answerverifiedacetylide ...View AnswerShow Answer

What is the IUPAC name of the following compound

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Which sequence of reactions can be used to convert (Z) 2-pentene to 2-pentyne

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Which of the following reagents react with 2-butyne to form (Z) -2-butene 1) H2/Lindlar catalyst 2) (sia) 2BH followed by CH3COOH 3) Na/NH3

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What is the major organic product obtained from the following reaction?

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H2 and Ni would be the required reagents for the following conversion.

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Select the best reagent or sequence of reagents from the list provided which would best accomplish each transformation below. Place the letter corresponding to the reagent(s) in the blank to the left of each reaction. Each transformation requires only one answer. -_____

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Outline how one might achieve the following transformation, showing reagents and the isolated intermediates in the synthetic scheme.

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What is the major organic product obtained from the following reaction?

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What is IUPAC name of the following compound?

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What is IUPAC name of the following compound?

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Which of the following has the lowest pKa?

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Outline how one might achieve the following transformation, showing reagents and the isolated intermediates in the synthetic scheme.

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What is the major organic product obtained from the following reaction?

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What is the IUPAC name for the following compound?

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How many terminal alkynes are there with the molecular formula C7H12?

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The product of the reaction when the following substance is treated with BH3 in THF followed by H2O2 would be a ketone.

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What is the major organic product obtained from the following series of reactions?

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What is the major organic product obtained from the following reaction?

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Consider an unknown with the molecular formula C4H6. The index of hydrogen deficiency of this compound is _____.

Correct AnswerverifiedShow Answer

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acetylide ...
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Which of the following reagents react with 2-butyne to form (Z) -2-butene 1) H₂/Lindlar catalyst 2) (sia) ₂BH followed by CH₃COOH 3) Na/NH₃

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H₂ and Ni would be the required reagents for the following conversion.

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Which of the following has the lowest pK_a?

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How many terminal alkynes are there with the molecular formula C₇H₁₂?

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The product of the reaction when the following substance is treated with BH₃ in THF followed by H₂O₂ would be a ketone.

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Consider an unknown with the molecular formula C₄H₆. The index of hydrogen deficiency of this compound is _____.

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